3M 1245 Tape consists of an embossed 1-ounce deadsoft copper foil backing and an aggressive pressure-sensitive acrylic adhesive. The tape is typically used for applications requiring excellent electrical conductivity from the application substrate through the adhesive to the foil backing, such as grounding and EMI shielding in equipment, components, shielded rooms, etc. The copper foil backing is solderable and resists oxidation and discoloration.
3M 1245 Tape consists of an embossed 1‑ounce dead‑soft copper foil backing with an aggressive pressure‑sensitive acrylic adhesive. The embossed pattern penetrates the adhesive to create reliable metal‑to‑metal contact, making the tape suitable for grounding and EMI shielding in equipment, components, and shielded rooms.
The tape offers a backing thickness of 1.4 mil (0.04 mm), total thickness of 4.0 mil, breaking strength of 25 Ib./in, adhesion to steel of 35 oz/in, and an electrical resistance through the adhesive of 0.001 Ω. It passes UL‑recognized flame‑retardancy tests and provides typical far‑field shielding effectiveness of 75‑85 dB from 80 MHz to 1 GHz.
| Backing thickness | 1.4 mil (0.04 mm) |
|---|---|
| Total thickness (backing plus adhesive) | 4.0 mil (101mm) |
| Breaking strength | 25 Ib./in (44 N/10mm) |
| Adhesion to steel | 35 oz/in (3.8 N/10mm) |
| Flame retardancy | Pass (UL 510) |
| Shielding effectiveness (far field) | 75‑85 dB (80 MHz‑1 GHz) |
It provides 75‑85 dB of shielding effectiveness in the far field, measured from 80 MHz to 1 GHz.
The copper foil backing is 1.4 mil (0.04 mm) thick.
Yes, it passes flame‑retardancy testing per UL 510.